CN102770225A - Power supply device for electric discharge machining machine and method for controlling same - Google Patents
Power supply device for electric discharge machining machine and method for controlling same Download PDFInfo
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- CN102770225A CN102770225A CN2011800023578A CN201180002357A CN102770225A CN 102770225 A CN102770225 A CN 102770225A CN 2011800023578 A CN2011800023578 A CN 2011800023578A CN 201180002357 A CN201180002357 A CN 201180002357A CN 102770225 A CN102770225 A CN 102770225A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Abstract
A power supply device for an electric discharge machining machine comprises: a capacitor (Cq) for storing charge; a DC power supply (V) for charging the capacitor (Cq); a first switching element (S1) for applying the charge stored on the capacitor (Cq) to an electrode gap (G) to generate a pulse-shaped discharge; and a control unit (10) for controlling the conduction/non-conduction of the first switching element (S1) on the basis of the voltage across the electrode gap (G). The control unit (10) controls the first switching element (S1) to be conductive, applies the charge stored on the capacitor (Cq) to the electrode gap (G), and then changes the time from a time point when the voltage across the electrode gap (G) lowers to a predetermined value or less until when the first switching element (S1) is controlled to be non-conductive, thereby controlling the magnitude of the discharge pulse generated across the electrode gap (G).
Description
Technical field
The present invention relates to the control method of a kind of electric discharge machine supply unit and electric discharge machine supply unit.
Background technology
In discharging processing machine; Under the situation of the control that improves discharge frequency in order to improve working ability; 2 problems of main existence; In the charging interval of one of which for savings is charged as the capacitor of the electric charge of discharge energy, another will be for putting aside the caloric value that is controlled as the switch element of connection when electric charge in capacitor discharges.
As existing electric discharge machine supply unit; An embodiment is disclosed in following patent documentation 1; Its for solve in the above-mentioned problem the former problem and dispose 4 series circuits that constitute by resistance and capacitor parallelly connectedly, and, to the charging of staggering the time of 4 capacitors; Thus, in fact make 4 times of the time lengthening of capacitor charging.In addition, in order to solve the latter's problem, disclose an embodiment, it connects 4 switch elements parallelly connectedly, and, they are connected simultaneously, thus, reduce the caloric value of single switch element.
Patent documentation 1: TOHKEMY 2003-205426 communique (Figure 26 and Figure 29)
Summary of the invention
But the method shown in the above-mentioned patent documentation 1 is the simple method that increases the parallelly connected quantity of discharge circuit and charging circuit, therefore, produces following problem,, when strengthening working ability, increases circuit scale inevitably that is.
The present invention In view of the foregoing proposes, and its purpose is to provide a kind of electric discharge machine supply unit and control method thereof, and it can avoid or suppress circuit scale increasing when strengthening working ability.
In order to solve above-mentioned problem, realize purpose, the invention is characterized in to have: electric charge savings element, it puts aside electric charge; Dc source, it charges to said electric charge savings element; The 1st switch element, its electric charge that will put aside in said electric charge savings element applies and the discharge that produces pulse type to electrode gap; And control part; It has test section; The electric parameter that the voltage of this test section pair and said electrode gap or the voltage that applies to this electrode gap change accordingly detects; This control part is based on the detected value of the detected electric parameter of this test section; Control the conduction/non-conduction of said the 1st switch element; Said control part be through will putting aside electric charge in said electric charge savings element after electrode gap applies in that said the 1st switch element is controlled to be conducting, the detected value from said electric parameter is reduced to the moment that is less than or equal to setting begins to change to the time that said the 1st switch element is controlled to be till non-conduction, thereby control the size of the discharge pulse of said electrode gap place generation.
The effect of invention
According to the present invention, the effect that circuit scale increases can avoided or suppress to realization when strengthening working ability.
Description of drawings
Fig. 1 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 1 at interior discharging processing machine.
Fig. 2 is the figure that expression produces an example of the sequential chart under the situation of the less pulsed discharge of electrode current.
Fig. 3 is the figure that expression produces an example of the sequential chart under the situation of the bigger pulsed discharge of electrode current.
Fig. 4 is the figure that expression produces an example of the sequential chart under the situation mix the group pulse discharge that bigger pulsed discharge of electrode current and less pulsed discharge are arranged.
Fig. 5 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 2 at interior discharging processing machine.
Fig. 6 is the figure of an example of the related sequential chart of the control action of expression embodiment 2.
Fig. 7 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 3 at interior discharging processing machine.
Fig. 8 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 4 at interior discharging processing machine.
Fig. 9 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 5 at interior discharging processing machine.
The explanation of label
10 control parts
11 voltage detection departments
12 voltage configuration parts
13 voltage ratios are than portion
14 action configuration parts
15 switch control parts
16 current detecting parts
17 current settings portions
18 current ratios are than portion
21 current transformers (CT)
Cp, Cs electrostatic capacitance
The Cq capacitor
The E electrode
The G electrode gap
The Lp inductance
The Ls stray inductance
The Rk shunt resistance
Rp, Rs resistance
The resistance of Rw working fluid
S1 the 1st switch element
S2 the 2nd switch element
The V dc source
The W machined object
The specific embodiment
Below, with reference to accompanying drawing, electric discharge machine supply unit and control method thereof that embodiment of the present invention is related are described.In addition, the present invention and can't help below the embodiment that illustrates limit.
Fig. 1 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 1 at interior discharging processing machine.Embodiment 1 related electric discharge machine supply unit constitute have dc source V, resistance R s, capacitor Cq, the 1st switch element S1, the 2nd switch element S2 and control part 10.
In Fig. 1, machined object W and electrode E (be line electrode under the situation of discharging processor for line electrode, under the situation of shape carving discharging processing machine, be shaped electrode) are connected with dc source V via the 1st switch element S1 (here illustration goes out FET) and resistance R s.Capacitor Cq is an electric charge savings element, is connected with the two ends of resistance R s that is connected in series and dc source V.The drain electrode end of the 1st switch element S1 is connected with the end of capacitor Cq, and source terminal is connected with the drain electrode end of the 2nd switch element S2 (here illustration goes out FET).The source terminal of the 2nd switch element S2 is connected with the other end of capacitor Cq, and its result forms the circuit structure that is connected with the negative pole end of dc source V.
At the two ends of machined object W and electrode E, on circuit structure, append the resistance R w of electrostatic capacitance Cs and working fluid with the form that is connected in parallel.With except above-mentioned electrostatic capacitance Cs and resistance R w, further append the form of the stray inductance Ls on the current path that may reside between dc source V and the electrode E, form circuit.In addition, stray inductance Ls is present in the inner inductance composition of electric discharge machine supply unit or inductance composition that conductor portion that the electric discharge machine supply unit is connected with machined object W and electrode E etc. is had.
On the other hand, control part 10 is the structural portion of carrying out the switch control of the 1st switch element S1 and the 2nd switch element S2, constitute have voltage detection department 11, voltage configuration part 12, voltage ratio be than portion 13, action configuration part 14 and switch control part 15.The voltages that 11 pairs of voltage detection departments produce at the electrode gap G place that forms between machined object W and the electrode E (below be called " voltage across poles ") detect.Voltage ratio than portion 13 will by voltage detection department 11 detected voltage across poles with compare from the setting voltage of voltage configuration part 12, generate the comparison signal whether the expression voltage across poles is higher than setting voltage, and to 15 inputs of switch control part.Switch control part 15 based on from voltage ratio than the comparison signal of portion 13 and the signal set by action configuration part 14; Generation is used for the control signal with the 1st switch element S1 and the 2nd switch element S2 on/off, and the 1st switch element S1 and the 2nd switch element S2 are controlled.
Below, the action of electric discharge machine supply unit is described.Fig. 2 is the figure that expression produces an example of the sequential chart under the situation of the less pulsed discharge of electrode current.In Fig. 2, switch control part 15 is controlled to be ON with the 1st switch element S1.Like this, the electric charge of savings in capacitor Cq applies to electrode gap G, and voltage across poles rises.This voltage across poles is detected by voltage detection department 11.Voltage across poles greater than the situation of the voltage that sets through voltage configuration part 12 (below be called " setting voltage ") under (this figure (a)), generate comparison signals (this figure (b)) by voltage ratio than portion 13.After voltage across poles rose, electrode current began to flow if begin discharge, then voltage across poles decline (this figure (a)).Switch control part 15 is beginning through behind the stipulated time t1 the 1st switch element S1 to be controlled to be OFF (this figure (c)) from comparison signal decline.Switch control part 15 can not be under the timing of ON being predicted as the 1st switch element S1 and the 2nd switch element S2 after the 1st switch element S1 is controlled to be OFF simultaneously, and the 2nd switch element S2 is not controlled to be ON (this figure (d)).Through this control, the 2nd switch element S2 discharges (interpolar) short circuit between machined object W and the electrode E to the electric charge among the electrostatic capacitance Cs that remains in interpolar.In addition, because the 1st switch element S1 is OFF, so the electric charge that remains among the capacitor Cq remains unchanged.
Through above-mentioned control, the electrode current shown in Fig. 2 (e) flows.In addition; The dotted line of this figure (e) is the dummy line that expression is contemplated for the size of current that flows through when using whole quantities of electric charge of savings in capacitor Cq to discharge, and the area of dotted line and time shaft institute area surrounded is equivalent to put aside the whole quantities of electric charge in capacitor Cq.Under the situation of Fig. 2, owing to will set shortlyer at the comparison signal stipulated time t1 that back the 1st switch element S1 is controlled as OFF that descends, so can the size of electrode current be restricted to smaller value.
On the other hand, Fig. 3 is the figure that expression produces an example of the sequential chart under the situation of the bigger pulsed discharge of electrode current.In Fig. 3, be with the difference of Fig. 2 in the control, shown in Fig. 3 (c), will be controlled as the stipulated time t2 of OFF at comparison signal back the 1st switch element S1 that descends, compare with the situation (stipulated time t1) of Fig. 2 and set to such an extent that grow (t2＞t1).The electric charge of savings in capacitor Cq, the 1st switch element S1 be ON during according to the time constant of roughly confirming by stray inductance Ls and electrostatic capacitance Cs, supply with to electrode gap G.Under the situation of Fig. 3, elongated owing to comparing with the example of Fig. 2 to the time of electrode gap G supply, so the peak value of electrode current becomes greatly, in addition, flowing time is also elongated.In addition, in the example of Fig. 3, the stipulated time t2 that the 1st switch element S1 is controlled to be OFF is set near the peak value of electrode current, but is not limited near the peak value of electrode current shown in this figure (e).For example, the stipulated time t2 that the 1st switch element S1 is controlled to be OFF also can be the long period that surpasses the peak value of electrode current.
In addition, Fig. 4 is the figure that expression produces an example of the sequential chart under the situation mix the group pulse discharge that bigger pulsed discharge of the quantity of electric charge and less pulsed discharge are arranged.In the present example, shown in Fig. 4 (e), control to continue to produce the such group pulse (P2) of electrode current less current pulse afterwards in the bigger current impulse of electrode current (P1).
In discharging processing machine; Be shaped as under the situation that target processes with a certain; Seldom only utilize time processing to fulfil assignment, from be called rough machined be machined to the fine finishining that the surface accuracy that is used to make the machined object section becomes meticulous till, need repeatedly process usually.Therefore; In common discharging processing machine; In order to contain from using roughing than macro-energy to the fine finishining that utilizes less energy to carry out, and Switching power is set, can make the size variation of discharge pulse with processing accordingly; Perhaps have a plurality of power circuits, carry out the control of Switching power circuit self.In addition, in order to take into account high process velocity and meticulous surface roughness, also in the consecutive pulses discharge, apply 1 big discharge pulse and a plurality of less discharge pulse repeatedly.
In the discharging processing machine of embodiment 1; Also preferably have above-mentioned control the function of discharge pulse size accordingly with roughing and fine finishining in, also have the function that can in the consecutive pulses discharge, apply 1 big discharge pulse and a plurality of less discharge pulses repeatedly.In the discharging processing machine of embodiment 1, utilize the function of control part 10 to realize above-mentioned functions.
Return Fig. 4, the action shown in these figure (a) and (b) is identical with Fig. 2 and Fig. 3.On the other hand, in example shown in Figure 4, at first, after beginning through stipulated time t3 (the 1st stipulated time), the 1st switch element S1 is controlled to be OFF, thereby produces the bigger discharge pulse (P1) of electrode current in the moment that descends from comparison signal.Then; Begin from the moment that the 1st switch element S1 is controlled to be OFF after through stipulated time t4 (the 2nd stipulated time), the 1st switch element S1 is controlled to be ON, and; Begin from the moment that the 1st switch element S1 is controlled to be ON after through stipulated time t5 (the 3rd stipulated time); The 1st switch element S1 is controlled to be OFF, thus, produces the less discharge pulse (P2) of electrode current.In addition, through carrying out the control of OFF time t4 and ON time t5 repeatedly, thereby produce discharge pulse P2 and the less pulse group (P3) of electrode current before this with stipulated number.
In addition, in the example of Fig. 4, during the 1st switch element S1 is controlled to be the t4 of OFF, the 2nd switch element S2 is controlled to be ON (this figure (d)), this control is to make the control that remains in the charge discharge among the electrostatic capacitance Cs.In addition, in the example of Fig. 4, carry out the control of repetition OFF time t4 and ON time t5, their time parameter does not need identical certainly, can the pulsewidth of the front and back pulse in the group pulse be changed yet.
As implied above; In the electric discharge machine supply unit and control method thereof of embodiment 1; Control part 10 will be through putting aside electric charge in capacitor Cq after electrode gap G applies in that the 1st switch element S1 is controlled to be conducting; Begin to change for be low to moderate the moment that is less than or equal to setting from voltage detection department 11 detected detection voltage drops to the time that the 1st switch element S1 is controlled to be till non-conduction; Thereby be controlled at the size of the discharge pulse that electrode gap G place produces, so the circuit structure that need not to change the electric discharge machine supply unit just can strengthen working ability.
In addition; Electric discharge machine supply unit and control method thereof according to embodiment 1; Owing to can at random control from becoming conducting to the time that becomes till non-conduction to the 1st switch element S1; So can when avoiding or suppressing the circuit scale increase, generate the different a plurality of discharge pulses of current value.
In addition; Electric discharge machine supply unit and control method thereof according to embodiment 1; Through the 1st switch element S1 is at random controlled from becoming conducting to the time that becomes till non-conduction, thereby can generate the different discharge pulse of current value, therefore; Even make in machined object W change, environment change under the situation that electrode impedance changes, also can keep a certain fixing processing conditions.
In addition, as the employed switch element of existing electric discharge machine supply unit, normally with the switch element (IGBT, MOSFET etc.) of silicon (Si) as raw material.On the other hand, illustrated technology is not defined as the switch element that forms as raw material with silicon in above-mentioned embodiment 1.Certainly will substitute above-mentioned silicon and use the carborundum (SiC) that receives publicity in recent years switch element, be used in the electric discharge machine supply unit as raw material.
Here; Carborundum has the characteristic that can at high temperature use; So,, then can improve the permission operating temperature of switch element if use with the switch element of carborundum as raw material as the switch element that is had in the electric discharge machine supply unit; Therefore, can avoid the problem of caloric value reliably.Thus, can when avoiding or suppressing the circuit scale increase, realize the enhancing of working ability.
In addition, the switch element that utilizes carborundum to form is also higher owing to hear resistance, so can make radiator (heat sink) miniaturization subsidiary on the switch element, can make the further miniaturization of device.
In addition, owing to the power attenuation of the switch element that utilizes carborundum to form is lower, can make the switch element high efficiency, thereby can make the device high efficiency.
In addition, carborundum (SiC) is that basis is compared the semi-conductive example that big this characteristic of band gap is called as wide band gap semiconducter with silicon (Si).Except this carborundum, use gallium nitrate kind material for example and diamond and the semiconductor that forms also belongs to wide band gap semiconducter, their characteristic is a lot of and carborundum is similar.Thus, use the structure of other wide band gap semiconducter except that carborundum also to constitute purport of the present invention.
Embodiment 2.
Fig. 5 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 2 at interior discharging processing machine.In Fig. 5; Be with the difference of Fig. 1; Be added with the spuious electrostatic capacitance Cp, resistance R p and the inductance L p that produce owing to other circuit or structure mechanically at the two ends of machined object W and electrode E, omit the 2nd switch element S2 on the other hand, especially; Under the situation of shape carving discharging processing machine, can form the circuit structure of Fig. 5.In addition, except shape carving discharging processing machine,, can omit the 2nd switch element S2 existing because the spuious resistance components that other circuit or structure mechanically produce and its resistance value are stated after being to carry out under the situation of size of discharging action degree.
In Fig. 5, spuious resistance R p compares less with the resistance R w of working fluid.Therefore; Even under the situation that does not produce discharge, or produce discharge and also only carry out under the situation of the less discharge of electrode current; Because the electric charge of savings in electrostatic capacitance Cs, Cp is through resistance R p discharge, so the electric charge that remains in electrode gap G place is disappeared.
Fig. 6 is the figure of an example of the related sequential chart of the control action of expression embodiment 2.In Fig. 6, only be that with the difference of Fig. 4 do not have the control relevant with the 2nd switch element, other action is identical with Fig. 4.Therefore, in the electric discharge machine supply unit and control method thereof of embodiment 2, also can obtain effect identical with embodiment 1 or that be equal to.
Embodiment 3.
Fig. 7 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 3 at interior discharging processing machine.In Fig. 7, only be with the difference of Fig. 1, the detection position of voltage detection department 11 is changed to the two ends of capacitor Cq from interpolar (between machined object W and the electrode E).
The voltage of capacitor Cq is the electric parameter of the quantity of electric charge put aside of direct representation capacitor Cq, and, have the movement identical with the change in voltage of discharge capacitor Cq together with the change in voltage of electrode gap G.Therefore, in the electric discharge machine supply unit and control method thereof of embodiment 3, also can obtain effect identical with embodiment 1,2 or that be equal to.
Fig. 8 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 4 at interior discharging processing machine.In embodiment 1, the detected object of control part 10 is the voltage of electrode gap G, but in embodiment 4, its difference is that the detected object of control part 10 is the electric current that flows through electrode gap G.Therefore; In embodiment 4, in control part 10, instead of voltage test section 11 and have current detecting part 16; Instead of voltage configuration part 12 and have current settings portion 17; Instead of voltage comparison portion 13 and have current ratio than portion 18, and the current path between the 1st switch element S1 and the electrode gap G is provided with the shunt resistance Rk that current detecting is used.In addition, other structure is identical with Fig. 1 or be equal to, the mark same numeral at the same position place and representing.
Below, the action of electric discharge machine supply unit is described.The electric current (below be called " processing electric current ") that current detecting part 16 will flow through electrode gap G for processing detects as the voltage that the two ends at shunt resistance Rk produce.Current ratio compares with current detecting part 16 detected processing electric currents with from the setting electric current of current settings portion 17 than portion 18, generates the expression processing electric current and whether is higher than the comparison signal of setting electric current, and import to switch control part 15.Switch control part 15 is based on the signal of setting than the comparison signal and the utilization action configuration part 14 of portion 18 from current ratio; Generation is controlled the 1st switch element S1 and the 2nd switch element S2 with the control signal of the 1st switch element S1 and the 2nd switch element S2 on/off.In addition, thereafter action and embodiment 1 is identical or be equal to.
Electrode current is the electric parameter of direct representation discharge energy, and has the movement identical with the change in voltage of electrode gap G with the variation of discharge processing electric current together.Therefore, in the electric discharge machine supply unit and control method thereof of embodiment 4, also can obtain effect identical with embodiment 1 to 3 or that be equal to.
Fig. 9 is that expression comprises the figure that constitute example of the related electric discharge machine supply unit of embodiment 5 at interior discharging processing machine.In Fig. 9, only be with the difference of Fig. 8, the detecting unit of processing electric current is changed to current transformer (CT) 21 from shunt resistance Rk.Therefore, in the electric discharge machine supply unit and control method thereof of embodiment 5, also can obtain effect identical with embodiment 1 to 4 or that be equal to.
In addition, owing under the situation of using current transformer 21, need not insert shunt resistance Rk, thus do not produce the loss that produces by shunt resistance Rk, corresponding, compare with the electric discharge machine supply unit of embodiment 4, can reduce the consumed power of device.
More than; Be illustrated to embodiment 1 to 5 related electric discharge machine supply unit and control method thereof; But said structure is merely an example of structure of the present invention; Certainly make up with other known technology, also can be in the scope that does not break away from purport of the present invention, omit the change of part etc. and constitute.
Industrial applicibility
As implied above, the electric discharge machine supply unit that this embodiment is related and the control method of electric discharge machine supply unit work as can when avoiding or suppressing the circuit scale increase, strengthening the invention of working ability.
Claims (13)
1. an electric discharge machine supply unit is characterized in that,
Have: electric charge savings element, it puts aside electric charge;
Dc source, it charges to said electric charge savings element;
The 1st switch element, its electric charge that will put aside in said electric charge savings element applies and the discharge that produces pulse type to electrode gap; And
Control part; It has test section; The electric parameter that the voltage of this test section pair and said electrode gap or the voltage that applies to this electrode gap change accordingly detects; This control part is controlled the conduction/non-conduction of said the 1st switch element based on the detected value of the detected electric parameter of this test section
Said control part will be through putting aside electric charge in said electric charge savings element after electrode gap applies in that said the 1st switch element is controlled to be conducting; Detected value from said electric parameter is reduced to the moment that is less than or equal to setting begins to change, thereby control the size of the discharge pulse that said electrode gap place produces to the time that said the 1st switch element is controlled to be till non-conduction.
2. electric discharge machine supply unit according to claim 1 is characterized in that,
Said control part is through after being reduced to the moment that is less than or equal to setting and beginning through the 1st stipulated time at the detected value from said electric parameter; Be controlled to be said the 1st switch element non-conduction; Thereby make said electrode gap place produce the 1st discharge pulse; In addition; Through from said the 1st switch element being controlled to be after the non-conduction moment begins through the 2nd stipulated time, said the 1st switch element is controlled to be conducting, and begin through the 3rd short stipulated time of comparing with said the 1st stipulated time from the moment that said the 1st switch element is controlled to be conducting after; Said the 1st switch element is controlled to be non-conduction, compares the 2nd less discharge pulse with said the 1st discharge pulse thereby said electrode gap place is produced.
3. electric discharge machine supply unit according to claim 2 is characterized in that,
Said the 2nd discharge pulse is made up of a plurality of discharge pulses.
4. electric discharge machine supply unit according to claim 1 is characterized in that,
Also have the 2nd switch element, it constitutes, and is connected in parallel with said electrode gap, can be with said electrode gap short circuit,
Said control part is controlled and will be put aside the charge discharge at said electrode gap place said the 2nd switch element during said the 1st switch element non-conduction.
5. electric discharge machine supply unit according to claim 1 is characterized in that,
Said the 1st switch element is formed by wide band gap semiconducter.
6. electric discharge machine supply unit according to claim 5 is characterized in that,
The semiconductor of said wide band gap semiconducter for using carborundum, gallium nitrate kind material or diamond to form.
7. according to each described electric discharge machine supply unit in the claim 1 to 6, it is characterized in that,
The test section that said electric parameter is detected is a voltage detection department, and said voltage detection department detects the voltage of said electrode gap.
8. according to each described electric discharge machine supply unit in the claim 1 to 6, it is characterized in that,
The test section that said electric parameter is detected is a voltage detection department, and said voltage detection department detects the voltage of said electric charge savings element.
9. according to each described electric discharge machine supply unit in the claim 1 to 6, it is characterized in that,
The test section that said electric parameter is detected is a current detecting part, and said current detecting part detects the electric current that flows through said electrode gap.
10. the control method of an electric discharge machine supply unit, this electric discharge machine supply unit has: electric charge savings element, it puts aside electric charge; Dc source, it charges to said electric charge savings element; The 1st switch element, its electric charge that will put aside in said electric charge savings element applies and the discharge that produces pulse type to electrode gap; And test section, it detects the electric parameter that changes accordingly with the voltage of said electrode gap or the voltage that applies to this electrode gap,
The control method of this electric discharge machine supply unit is characterised in that, comprises following step:
The 1st step in this step, is controlled to be conducting and the electric charge that will put aside in said electric charge savings element applies to electrode gap with said the 1st switch element; And
The 2nd step; In this step; After the control of said the 1st step; Begin to change through the detected value from said electric parameter being reduced to the moment that is less than or equal to setting, thereby be controlled at the size of the discharge pulse that said electrode gap place produces to the time that said the 1st switch element is controlled to be till non-conduction.
11. the control method of electric discharge machine supply unit according to claim 10 is characterized in that,
In said electric discharge machine supply unit, be provided with the 2nd switch element, it constitutes, and is connected in parallel with said electrode gap, can be with said electrode gap short circuit,
The control method of this electric discharge machine supply unit also comprises the 3rd step; In this step; During said the 1st switch element after said the 2nd step non-conduction, said the 2nd switch element is controlled and will be put aside the charge discharge at said electrode gap place.
12. the control method of electric discharge machine supply unit according to claim 10 is characterized in that,
Said the 2nd step comprises sub-steps:
The 1st substep in this substep, is reduced to after the moment that is less than or equal to setting begins through the 1st stipulated time at the detected value from said electric parameter, is controlled to be said the 1st switch element non-conduction;
The 2nd substep in this substep, from by said the 1st substep said the 1st switch element being controlled to be after the non-conduction moment begins through the 2nd stipulated time, is controlled to be conducting with said the 1st switch element; And
The 3rd substep in this substep, begin through the 3rd short stipulated time of comparing with said the 1st stipulated time from the moment that said the 1st switch element is controlled to be conducting by said the 2nd substep after, is controlled to be said the 1st switch element non-conduction.
13. the control method of electric discharge machine supply unit according to claim 12 is characterized in that,
In said electric discharge machine supply unit, be provided with the 2nd switch element, it constitutes, and is connected in parallel with said electrode gap, can be with said electrode gap short circuit,
The control method of this electric discharge machine supply unit also comprises sub-steps; Promptly; During during said the 1st switch element behind said the 1st substep non-conduction and in during said the 1st switch element behind said the 3rd substep non-conduction at least one, said the 2nd switch element is controlled and will be put aside the charge discharge at said electrode gap place.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/054390 WO2012114524A1 (en) | 2011-02-25 | 2011-02-25 | Power supply device for electric discharge machining machine and method for controlling same |
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| Publication Number | Publication Date |
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| CN102770225A true CN102770225A (en) | 2012-11-07 |
| CN102770225B CN102770225B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201180002357.8A Active CN102770225B (en) | 2011-02-25 | 2011-02-25 | Power supply device for electric discharge machining machine and method for controlling same |
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| Country | Link |
|---|---|
| US (1) | US20120228268A1 (en) |
| JP (1) | JP4850318B1 (en) |
| CN (1) | CN102770225B (en) |
| DE (1) | DE112011104963T5 (en) |
| WO (1) | WO2012114524A1 (en) |
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| CN104772536A (en) * | 2014-01-15 | 2015-07-15 | 发那科株式会社 | Wire electric discharge machine |
| CN110912421A (en) * | 2018-09-14 | 2020-03-24 | 通用电气航空系统有限责任公司 | Power overlay architecture |
| CN112453606A (en) * | 2019-09-09 | 2021-03-09 | 发那科株式会社 | Wire electric discharge machine and control method |
| CN112912193A (en) * | 2018-10-31 | 2021-06-04 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
| CN112930238A (en) * | 2018-10-31 | 2021-06-08 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
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| WO2013080347A1 (en) * | 2011-11-30 | 2013-06-06 | 三菱電機株式会社 | Power supply device for electric discharge machine |
| JP5414864B1 (en) * | 2012-09-18 | 2014-02-12 | 株式会社ソディック | Machining power supply for wire-cut electrical discharge machining equipment |
| JP5689211B1 (en) * | 2013-04-04 | 2015-03-25 | 西部電機株式会社 | Electric discharge machining apparatus, electric discharge machining method and design method |
| FR3083999B1 (en) * | 2018-07-23 | 2020-06-26 | Thermocompact | METHOD AND DEVICE FOR PREVENTING BREAKDOWN OF ELECTRODE WIRE DURING EROSIVE SPARKING MACHINING |
| US10985537B2 (en) * | 2018-09-14 | 2021-04-20 | Ge Aviation Systems Llc | Power overlay architecture |
| TWI767550B (en) * | 2021-02-03 | 2022-06-11 | 精呈科技股份有限公司 | Discharge Width Modulation Method for Finishing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104772536A (en) * | 2014-01-15 | 2015-07-15 | 发那科株式会社 | Wire electric discharge machine |
| CN110912421A (en) * | 2018-09-14 | 2020-03-24 | 通用电气航空系统有限责任公司 | Power overlay architecture |
| CN110912421B (en) * | 2018-09-14 | 2023-04-14 | 通用电气航空系统有限责任公司 | Power overlay architecture |
| CN112912193A (en) * | 2018-10-31 | 2021-06-04 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
| CN112930238A (en) * | 2018-10-31 | 2021-06-08 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
| CN112930238B (en) * | 2018-10-31 | 2024-03-29 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
| CN112912193B (en) * | 2018-10-31 | 2024-04-05 | 株式会社牧野铣床制作所 | Power supply device for electric discharge machine |
| CN112453606A (en) * | 2019-09-09 | 2021-03-09 | 发那科株式会社 | Wire electric discharge machine and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2012114524A1 (en) | 2014-07-07 |
| CN102770225B (en) | 2014-09-17 |
| JP4850318B1 (en) | 2012-01-11 |
| WO2012114524A1 (en) | 2012-08-30 |
| US20120228268A1 (en) | 2012-09-13 |
| DE112011104963T5 (en) | 2013-11-28 |
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